i made a backup in Blockchain.info and upload my backup here: https://blockchain.info/wallet/import-wallet
then i wrote my previous wallet password and the wallet opened but no bitcoins on it.
did i do somthing wrong ?
I think you are trying to import private key right?
Also are you make a backup from online wallet to online wallet? Or client wallet to online wallet? Or what?
Some privkey back up file are encrypted, so you can't just copy paste it, you need to decrypt the privkey file first and then you are able to import it.
But if it's not the problem then maybe importing privkey need time to sync before the balance number show up.